Motto associated with the airborne infantry, specifically the paratroopers of the 101st Airborne Division. The phrase "Death From Above" has turned up in countless places, from Flaming Carrot Comics (where it is painted on the Mystery Men's gunship) to the movie version of Starship Troopers (whose mobile infantry heroes have the slogan tattooed on their arms).
"Death From Above" is also a drink containing Bacardi, gin, and Coca-Cola. It is also the name of a heavy metal band whose Web page declares that they have recorded "the most evil record anyone has ever heard."
54b says "Actually the 101st Airborne Division is an Air Assault division. They only retain the name Airborne because they were Airborne in World War II."